محمدرضا جلال کمالی
زهرا ناطق

This study was carriedout to deyelop required genetic variation for southern. dry and warm zone (Zone ll) nom crosses made between different bread wheat genotypes. 186 genotypes as parents were categorized in the crossing block based on different traits and characteristks. Each genotype was sown in two sowing date with IS days interval, in 2002 -03 cropping season. 277 crossing program were carried out. Female parents were emasculated in spring and after 48 to 72 hours were pollinated by polIens of concerned male parents. Hybrid seeds for each crossing program-were 'harvested separately. .to be -grown -and-evaluated,.in the. pre.s~qc;U) fconcerned female parents, in the following cropping season, 2003 _ 04. Seeds of FI (119 simple crosses and 101 three way crosses) nom crosses made in the previous cropping season (2001 - 02) were also grown and evaluated. Harvested F2 seeds were considered to be grown in s'!uthem warm an~ dry Zone field stations in 2003 -04. -. Key words: Male parent, Female parent, Crossing, traits

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